The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2025
Filed:
Sep. 08, 2022
The Regents of the University of Michigan, Ann Arbor, MI (US);
Mengjie Yu, Ann Arbor, MI (US);
Richard Laine, Ann Arbor, MI (US);
Eleni Temeche, Ann Arbor, MI (US);
The Regents of The University of Michigan, Ann Arbor, MI (US);
Abstract
In various aspects, methods of making a silicon carbide or silicon nitride from rice hull ash (RHA) byproduct are provided. A treated silica depleted rice hull ash product (SDRHA) comprising silicon oxide at ≤about 65% by weight and carbon ≥about 35% by weight may be heated in an environment free of any additional carbon sources, but in an inert atmosphere, having a temperature of ≥about 1,200° C. to ≤about 1,700° C. for a carbothermal reaction that forms a product (e.g., nanocomposite product) comprising at least one of silicon carbide (SiC), silicon nitride (SiN), and silicon oxynitride (SiNO or non-stoichiometric SiNO, where x ranges from greater than 0 to less than 4). A negative electroactive material is also provided that includes silicon oxynitride (SiNO), which may be used in a lithium ion battery.